{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T10:48:41Z","timestamp":1761562121784,"version":"3.40.2"},"reference-count":24,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JNS"],"published-print":{"date-parts":[[2017,4]]},"abstract":"<jats:sec>\n<jats:title>OBJECTIVE<\/jats:title>\n<jats:p>Conventional approaches to the atrium of the lateral ventricle may be associated with complications related to direct cortical injury or brain retraction. The authors describe a novel approach to the atrium through a retrosigmoid transtentorial transcollateral sulcus corridor.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>METHODS<\/jats:title>\n<jats:p>Bilateral retrosigmoid craniotomies were performed on 4 formalin-fixed, colored latex\u2013injected human cadaver heads (a total of 8 approaches). Microsurgical dissections were performed under 3\u00d7 to 24\u00d7 magnification, and endoscopic visualization was provided by 0\u00b0 and 30\u00b0 rigid endoscope lens systems. Image guidance was provided by coupling an electromagnetic tracking system with an open source software platform. Objective measurements on cortical thickness traversed and total depth of exposure were recorded. Additionally, the basal occipitotemporal surfaces of 10 separate cerebral hemisphere specimens were examined to define the surface topography of sulci and gyri, with attention to the appearance and anatomical patterns and variations of the collateral sulcus and the surrounding gyri.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>RESULTS<\/jats:title>\n<jats:p>The retrosigmoid approach allowed for clear visualization of the basal occipitotemporal surface. The collateral sulcus was identified and permitted easy endoscopic access to the ventricular atrium. The conical corridor thus obtained provided an average base working area of 3.9 cm<jats:sup>2<\/jats:sup> at an average depth of 4.5 cm. The mean cortical thickness traversed to enter the ventricle was 1.4 cm. The intraventricular anatomy of the ipsilateral ventricle was defined clearly in all 8 exposures in this manner. The anatomy of the basal occipitotemporal surface, observed in a total of 18 hemispheres, showed a consistent pattern, with the collateral sulcus abutted by the parahippocampal gyrus medially, and the fusiform and lingual gyrus laterally. The collateral sulcus was found to be caudally bifurcated in 14 of the 18 specimens.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>CONCLUSIONS<\/jats:title>\n<jats:p>The retrosigmoid supracerebellar transtentorial transcollateral sulcus approach is technically feasible. This approach has the potential advantage of providing a short and direct path to the atrium, hence avoiding violation of deep neurovascular structures and preserving eloquent areas. Although this approach appears unconventional, it may provide a minimally invasive option for the surgical management of selected lesions within the atrium of the lateral ventricle.<\/jats:p><\/jats:sec>","DOI":"10.3171\/2016.3.jns151289","type":"journal-article","created":{"date-parts":[[2016,6,26]],"date-time":"2016-06-26T01:03:09Z","timestamp":1466902989000},"page":"1246-1252","source":"Crossref","is-referenced-by-count":8,"title":["Transtentorial transcollateral sulcus approach to the ventricular atrium: an endoscope-assisted anatomical study"],"prefix":"10.3171","volume":"126","author":[{"given":"Yasser","family":"Jeelani","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abdulkerim","family":"Gokoglu","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomer","family":"Anor","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ossama","family":"Al-Mefty","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alan R.","family":"Cohen","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School; and"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"key":"b1-jns151289","series-title":"Neurosurgery","doi-asserted-by":"publisher","first-page":"1046","DOI":"10.1227\/00006123-199412000-00005","article-title":"Surgical management of arteriovenous malformations in the region of the ventricular trigone","volume":"35","author":"Barrow DL,","year":"1994","unstructured":"Barrow DL, Dawson R: Surgical management of arteriovenous malformations in the region of the ventricular trigone. 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